2004-2006 Honda FourTrax Rancher TRX350TE/TM/FE/FM Service Manual, Page 302Get this manual
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FRONT DRIVING MECHANISM (FMFE model) If the backlash is excessive, replace the ring gear left side sh im with thinner neIf the backlash is too sma llreplace the ring gea left side shim with thicke neB